Secondary or storage battery.



-B.y FORD. SECONDARY o R STORAGE BATTERY.

APPLICATION FILED MAY 4, 1908.

'Patented Mar.1,4,1 9111.

U To all whom 'it may ctr/warn."V

UNITED sTATEs rATENT OFFICE.

EE'UCE Eonn, or PHILADELPHIA, PENNSYLVANIA.

SECONDARY OR STORAGE BATTERY.

l Specification of Letters Patent.

APatented Mar. 14, 1911.

Application inea May 4, 190s. serial-Neasden.

Be it known that I, BRUCE Fono, a citizen of the United States, and a resident of- Philadelphia, in the county of Philadelphia and State of Pennsylvama, have invented certain new and useful Improvements in Secondary or Storage Batteries, of which thefolljowing is a specification.

The principal obJect of the present invention is to provide for sealing the covers of' so-called portable batteries in such manner that they can be conveniently applied and removed and are properly centered, and this I accomplish by providingthe to-p of the jar witha seat that 'supports the loot- I tom and edge of the flange of the cover and with a rim extending beyond the face of the flange of the cover for the reception .of the sealing 'material which is supported on topu of the flange of the cover. y

The invention will be claimed at the` end hereof, but will first be described in connection with the accompanying drawings in which- Figure l, is a central sectional view of the upper portion of a battery embodying `features of the invention, and Fig. 2, is a top or plan view ofone type of seal. E

In the drawingsl, is a jar which contains the platesf'and the electrolyte. At the top the jar is provided with a seat 3, that supports the bottom and edge ofthe flange 4L, which projects from the bottom of the rim wall5, ofthe cover. There vis a rim 6, which-'extends upward from thejar above the seat 3, and into substantial alinement with the top of the cover. This rim 6, is shown as provided internally with a groove 7, and as constituting an off-set from the' walls of the jar. The bottom wall ofv .the groove 7, is above the seat 4and is substantially flush with the. top of the flange 4. 8, is a seal interposed. between the edge wall of the cover and the ,inner face of the rim 6, and it overlies the top of the flange 4,

of the cover. Obviously the seal is keyed in the groove 7 and overlies thepbottom of the groove and the top of the flange 4. Thus the cover is centered and is well held to place in the jar and when a fusible seal is used and is fused for the removal of the cover, the sealing compound is excluded from the jar. The seal may comprise a fusible sealing compound or may consist of a strip of rubber. In the latter case the strip may exceed in cross section thespace which receives it, and it can beplaced in such space by insertion while extended or stretched, so that when released it expands and makes .the necessary tight joint. The ends 9, of the strip may be beveled or chamfered and thus provide a good joint.

The described construction enables the seat 3 to center the cover and permits of the ready and convenient application and removal of the seal and cover. f

1 0, is a case that contains thejar l, and it is shown as grooved for the reception or accommodation of the offset portion of the jar.

117 is material that may be inserted between the case and jar.

What I claimis: I

In a storage battery the combination of a cover having a rim and having .a laterally extending flange arranged below the top of the rim and at right angles to the surface of In testimony whereof I have hereunto si ed In name.

gli BRUCE FORD.

Witnesses:

WM. J. JAoxsoN,

' FRANK E. FRENCH. 

